1 .\" Emacs mode: -*- nroff -*-
2 .TH DITROFF @MAN7EXT@ "@MDATE@" "Groff Version @VERSION@"
4 ditroff \- classical device independent roff
10 Copyright \[co] 2001-2014 Free Software Foundation, Inc.
12 This file is part of groff, the GNU roff type-setting system.
14 Permission is granted to copy, distribute and/or modify this document
15 under the terms of the GNU Free Documentation License, Version 1.3 or
16 any later version published by the Free Software Foundation; with no
17 Front-Cover Texts, and with no Back-Cover Texts.
19 A copy of the Free Documentation License is included as a file called
20 FDL in the main directory of the groff source package, it is also
21 available on-line at the
22 .UR http://\:www.gnu.org/\:copyleft/\:fdl.html
28 .MT groff-bernd.warken-72@\:web.de
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43 once marked a development level of the
45 text processing system.
51 is used as a synonym for
55 The first roff system was written by Joe Ossanna around 1973.
57 It supported only two output devices, the
59 program produced text oriented tty output, while the
61 program generated graphical output for exactly one output device, the Wang
62 .I Graphic Systems CAT
67 In 1979, Brian Kernighan rewrote troff to support more devices by
68 creating an intermediate output format for troff that can be fed into
69 postprocessor programs which actually do the printout on the device.
71 Kernighan\[aq]s version marks what is known as
75 In order to distinguish it from Ossanna\[aq]s original mono-device
76 version, it was called
78 .RI ( d "evice " i "ndependent " troff )
79 on some systems, though this naming isn\[aq]t mentioned in the
80 classical documentation.
84 Today, any existing roff system is based on Kernighan\[aq]s
87 The distinction between
91 isn\[aq]t necessary any longer, for each modern
93 provides already the complete functionality of
96 On most systems, the name
103 The easiest way to use ditroff is the GNU roff system,
106 .BR groff (@MAN1EXT@)
107 program is a wrapper around
109 that automatically handles postprocessing.
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118 The 1992 revision of the
119 .I Nroff/Troff User\[aq]s Manual
123 .IR "Brian Kernighan" ,
125 .UR http://\:cm.bell-labs.com/\:cm/\:cs/\:cstr/\:54.ps.gz
131 .I A Typesetter-independent TROFF
134 is the original documentation of the first multi-device troff
137 .UR http://\:cm.bell-labs.com/\:cm/\:cs/\:cstr/\:97.ps.gz
143 This document gives details on the history and concepts of roff.
146 .BR @g@troff (@MAN1EXT@)
147 The actual implementation of
151 .BR groff (@MAN1EXT@)
152 The GNU roff program and pointers to all documentation around groff.
155 .BR groff_out (@MAN5EXT@)
156 The groff version of the intermediate output language, the basis for
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